2.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- V. Konotop2 profiles96 · h 53
- Rui Santos55 · h 38
- P. Ferreira3 profiles39 · h 27
- M. M. Telo da Gama2 profiles33 · h 25
- Y. Kartashov28 · h 54
- D. Zezyulin26 · h 23
- N. Araújo2 profiles22 · h 21
- M. Mühlleitner16 · h 52
- J. M. Tavares14 · h 23
- L. Torner13 · h 65
- M. Tasinkevych2 profiles13 · h 28
- J. P. Silva2 profiles12 · h 30
- University of LisbonPT321 papers
- Instituto Politécnico de LisboaPT99 papers
- Institute of Photonic SciencesES24 papers
- Universidade Federal do CearáBR23 papers
- University of MinhoPT22 papers
- Universitat Politècnica de CatalunyaES21 papers
- ETH ZurichCH20 papers
- Institute of SpectroscopyRU19 papers
- Instituto Superior TécnicoPT19 papers
- Centre National de la Recherche ScientifiqueFR17 papers
- Karlsruhe Institute of TechnologyDE17 papers
- University of AveiroPT16 papers
21 papers · 1 filter
Similarity transformations for Nonlinear Schrodinger Equations with time varying coefficients: Exact results
Victor M. Perez-Garcia, Pedro J. Torres, Vladimir V. Konotop
In this paper we use a similarity transformation connecting some families of Nonlinear Schrodinger equations with time-varying coefficients with the autonomous cubic nonlinear Schr…
Impact of bistability in the synchronization of chaotic maps with delayed coupling
Pedro G. Lind, Ana Nunes, Jason A. C. Gallas
We investigate the impact of bistability in the emergence of synchronization in networks of chaotic maps with delayed coupling. The existence of a single finite attractor of the un…
Asymptotic behavior of the warm inflation scenario with viscous pressure
Jose P. Mimoso, Ana Nunes, Diego Pavon
We analyze the dynamics of models of warm inflation with general dissipative effects. We consider phenomenological terms both for the inflaton decay rate and for viscous effects wi…
Diffusion-limited deposition with dipolar interactions: fractal dimension and multifractal structure
M. Tasinkevych, J. M. Tavares, F. de los Santos
Computer simulations are used to generate two-dimensional diffusion-limited deposits of dipoles. The structure of these deposits is analyzed by measuring some global quantities: th…
Spin Correlations and Magnetic Susceptibilities of Lightly Doped Antiferromagnets
F. Carvalho Dias, I. R. Pimentel
We calculate the spin correlation function and the magnetic longitudinal and transverse susceptibilities of a two-dimensional antiferromagnet doped with a small concentration of ho…
Solitons of Bose-Fermi mixtures in a strongly elongated trap
J. Santhanam, V. M. Kenkre, V. V. Konotop
It is shown that a Bose-Fermi mixture of a degenerate gas of spin-polarized fermions, whose number significantly exceeds the number of bosons, embedded in a strongly anisotropic tr…
Epidemics in small world networks
M. M. Telo da Gama, A. Nunes
For many infectious diseases, a small-world network on an underlying regular lattice is a suitable simplified model for the contact structure of the host population. It is well kno…
Pair Approximation Models for Disease Spread
Jerome Benoit, Ana Nunes, Margarida Telo da Gama
We consider a Susceptible-Infective-Recovered (SIR) model, where the mechanism for the renewal of susceptibles is demographic, on a ring with next nearest neighbour interactions, a…
Flavour changing strong interaction effects on top quark physics at the LHC
P. M. Ferreira, O. Oliveira, R. Santos
We perform a model independent analysis of the flavour changing strong interaction vertices relevant to the LHC. In particular, the contribution of dimension six operators to singl…
Driving defect modes of Bose-Einstein condensates in optical lattices
V. A. Brazhnyi, V. V. Konotop, Víctor M. Pérez-García
We present an approximate analytical theory and direct numerical computation of defect modes of a Bose-Einstein condensate loaded in an optical lattice and subject to an additional…
Model of mobile agents for sexual interactions networks
M. C. Gonzalez, P. G. Lind, H. J. Herrmann
We present a novel model to simulate real social networks of complex interactions, based in a granular system of colliding particles (agents). The network is build by keeping track…
Charge and CP symmetry breaking in two Higgs doublet models
A. Barroso, P. M. Ferreira, R. Santos
We show that, for the most generic model with two Higgs doublets possessing a minimum that preserves the symmetry, charge breaking (CB) cannot occur. If CB does not occ…
Charge breaking bounds in the Zee model
A. Barroso, P. M. Ferreira
We study the possibility that charge breaking minima occur in the Zee model. We reach very different conclusions from those attained in simpler, two Higgs doublet models, and the r…
Stable and unstable vector dark solitons of coupled nonlinear Schrödinger equations. Application to two-component Bose-Einstein condensates
V. A. Brazhnyi, V. V. Konotop
Dynamics of vector dark solitons in two-component Bose-Einstein condensates is studied within the framework of the coupled one-dimensional nonlinear Schrödinger (NLS) equations. We…
Persistent current and Drude weight in mesoscopic rings
F. Carvalho Dias, I. R. Pimentel, M. Henkel
We study the persistent current and the Drude weight of a system of spinless fermions, with repulsive interactions and a hopping impurity, on a mesoscopic ring pierced by a magneti…
Dynamical quintessence fields Press-Schechter mass function: detectability and effect on dark haloes
Morgan Le Delliou
We present an investigations on the influence of dynamical quintessence field models on the formation of non-linear structures. In particular, we focus on the structure traced by t…
On localized solutions of discrete nonlinear Schrodinger equation. An exact result
P. Pacciani, V. V. Konotop, G. Perla Menzala
Local and global existence of localized solutions of a discrete nonlinear Schrodinger (DNLS) equation, with arbitrary on-site nonlinearity, is proved. In particular, it is shown th…
On collapse in the nonlinear Schrodinger equation with time dependent nonlinearity. Application to Bose-Einstein condensates
V. V. Konotop, P. Pacciani
It is proven that periodically varying and sign definite nonlinearity in a general case does not prevent collapse in two- and three-dimensional nonlinear Schrodinger equations: at…
Cycles and clustering in bipartite networks
Pedro G. Lind, Marta C. González, Hans J. Herrmann
We investigate the clustering ability in bipartite networks where cycles of size three are absent and therefore the standard definition of clustering coefficient cannot be used. In…
Phase dynamics and particle production in preheating
T. Charters, A. Nunes, J. P. Mimoso
We study a simple model of a massive inflaton field coupled to another scalar filed with interaction term . We use the theory developed by Kofman {\em et al.} (P…
Coherence in complex networks of oscillators
Pedro G. Lind, Jason A. C. Gallas, Hans J. Herrmann
We study fully synchronized (coherent) states in complex networks of chaotic oscillators, reviewing the analytical approach of determining the stability conditions for synchronizab…